<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title></title>
  <style>
  
  html,body {
    width: 100%;
    height: 100%;
    background: #fff;
  }
  .mode {
    position: absolute;
    top:0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    mix-blend-mode:difference;
    pointer-events: none;
  }
  </style>
</head>
<body>
  <div>
    <div>xxxxxxx</div>
    <div>xxxxxxx</div>
    <div>xxxxxxx</div>
    <div>xxxxxxx</div>
    <div>中文</div>
  </div>
  <img src="http://www.webhek.com/wordpress/wp-content/uploads/2016/03/a3551665615_10-e1458637443719-330x240.jpg" alt="Fresh Water" />
  <div class="mode"></div>
</body>
</html>